Info, impact, causes, and troubleshooting a "Zone Shutdown High Flow Variance" message.

Common Causes 

• Broken or missing sprinkler head. 
• Damaged lateral line for the valve.  
• Incorrect learned flow. 

What Happens Now? From the alert message:

• Zone 13 has been shut down because the controller has identified this zone as a source of high flow and will not water again until message is cleared.
• Flow Variance Threshold (measured in %) is set to allow a 20% variance, bthe controller detected a 25.1%. 
• Expected vs. Actual Flow (measured in Gallons per Minute (GPM)) are given. The controller expected a 41 GPM but only measured 51.3 GPM.

Troubleshooting 

• Repairing any broken sprinkler heads or damaged lateral line. 
• If you suspect a learn flow value is incorrect, re-learn flow for that zone. 
• Once the issue is resolved, clear the message to allow irrigation to resume. 

Learning Flow

• BaseManager → Zone Assignment. 
• Controller or through BaseManager Live View → Zone Learn Flow (or Program Learn Flow, if it applies).
• BaseManager Maps and select Learn Flow for individual zones.